FixedSizeStream decorating FixedSizeStream (#361)

* FixedSizeStream decorating FixedSizeStream

* Small optimization

* Fix cs

* Remove random test

Author: jderusse

src/Stream/FixedSizeStream.php

@@ -26,7 +26,11 @@ private function __construct(RequestStream $content, int $chunkSize = 64 * 1024)
     public static function create(RequestStream $content, int $chunkSize = 64 * 1024): FixedSizeStream
     {
         if ($content instanceof self) {
-            return $content;
+            if ($content->chunkSize === $chunkSize) {
+                return $content;
+            }
+
+            return new self($content->content, $chunkSize);
         }
 
         return new self($content, $chunkSize);

tests/Unit/Stream/FixedSizeStreamTest.php

@@ -43,6 +43,16 @@ public function testChunk(RequestStream $content, int $size, array $expected): v
         self::assertSame($expected, \iterator_to_array($stream));
     }
 
+    /**
+     * @dataProvider provideChunks
+     */
+    public function testDecoratingFixedSize(RequestStream $content, int $size, array $expected): void
+    {
+        $stream = FixedSizeStream::create(FixedSizeStream::create($content, 5), $size);
+
+        self::assertSame($expected, \iterator_to_array($stream));
+    }
+
     public function provideLengths(): iterable
     {
         yield [StringStream::create('Hello world'), 11];